hotbeds

例句:

• The monasteries were not hotbeds of crime and luxury.
  来自M. Cox
• Slums are hotbeds of crime and disease.
  贫民窟是滋生犯罪和疾病的温床.
  
• According to Ji, these crude public toilets were hotbeds for fly reproduction and disease.
  他认为, 这些简陋的公共厕所是苍蝇繁殖和传播疾病的温床.
  
• Newspapers are and always have been hotbeds of dodgy sexual behaviour.
  来自THETIMES
• Time and again, Saban has gone into the country's leading football hotbeds to pluck their best players.
  来自WSJ